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(No Model.)

T. MIDGLEY.

WIRE BELTING.

No. 398,423. Patented Feb. 26, 1889 UNITED STATES PATENT @rrics.

THOMAS HIDGLEY, OF BEAVER FALLS, PENNSYLVANIA, ASSIGNOR OF ONE- IIALF TOJAMES E. EMERSON, OF SAME PLACE.

WIRE BELTING.

SPECIFICATION forming part of Letters Iatent No. 398,423, dated February26, 1889.

Application filed May 31, 1888. Serial No. 275,579. (No model.)

To all whom it may concern:

Be it known that I, THOMAS MIDGLEY, a citizen of the United States,residing at Beaver Falls, in the county of Beaver and State ofPennsylvania, have invented certain new and useful Improvements in "WireBelting; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin IO the art to which it appertains to make and use the same.

My invention relates to wire belting, and has for its objectanimprovement in the belting shown and described in my application I 5 fora patent filed February 10, 1888, Serial No.

The in ention will be hereinafter described, and particularly pointedout in the claims.

In the accompanying drawings, which form part of this specification,Figure 1 is a plan view of a section of wire belting before beingflattened and folded. Fig. 2 is a similar view of a section of wirebelting after it has been 2 5 flattened and folded and an edge view ofthe same on an enlarged scale; and Fig. 3 represents a plan view of asection of flattened and folded wire belting partly covered with rubberand a cross-section thereof.

0 Reference being had to the drawings and the letters marked thereon, Arepresents helical coils of wire, which are twined together by one coilbeing screwed into another until a sheet or belt of any desired lengthand 3 5 width is formed. The coils A are of a length equal to double thewidth of a finished belt, and the sheet is folded transverselythroughout its length, bringing the edges B B together in or near thecenter of one side of the folded 4o sheet, as shown in Fig. 2.

The edges may be secured by a strand of wire, a; or a strip of rubber,a, may be applied over them and rolled into the interstices, which ineither case will prevent them separating. After the sheet has beenformed it is heated and the helices stretched and flattencd into linksI), as shown in Figs. 2 and 3, in any approved manner, and the linksmade to seat one in the adjacent end of the adjoining links throughoutthe entire length of the sheet to prevent stretching of the completedbelt when in use. The sheet is then folded transversely throughout itslength, bringing the ends of the coils together at or near the center ofone side of the folded sheet, and the whole tempered in a suitablefurnace. The ends of the coils are then secured. If by a strip ofrubber, the sheet is passed between. rolls with a strip of rubber overthe joint and rolled into the interstices of the sheet to cause it toadhere; if by a strand of wire, it

is subsequently rolled to set the folds at the edges.

By folding the sheettransversely from both sides or ends of the coils Asmooth workingedges 0 C are formed, which will not cut a shipper or thebelt when running crossed, and a belt of double thickness is producedthe weight of which is much less than a belt of single thicknesspossessing the same tensile 7 strength.

In narrow belting the wire maybe of lighter grade than in sin glebelting of the same width, and the weight of the wire should beincreased in proportion to an increased width 7 5 of the belt.

A belt thus (mist-meted may be covered on one side or both sides withrubber and earn vas, or rubber or its equivalent material alone, asshown at D in Fig. 3, and again passed between rolls heated to about 170to 17 2" Fahrenheit to cause the rubber to soften and embed itself inthe interstices between the links and adhere thereto.

The method involved in my invention is claimed in another application,Serial No. 277,866, filed June 22, 1888.

Having thus fully described my invention, what I claim is 1. A beltcomposed of a series of inter- 9 twined wire helices with doubled-overedges, forming a substantially central longitudinal seam on one side ofthe belt, as and for the purpose set forth.

2. A belt composed of a series of intertwined wire helices withdoubled-over edges,

forming a substantially central longitudinal I In testimony whereof Iaflix my signature in IO seam on one side of the belt, and secured inpresence of two Witnesses. the manner substantially as described.

A belt composed of a series of inter- THOMAS MIDGLEY. twined Wirehelices With doubled-over edges, 1 forming a substantially centrallongitudinal \Vitnesses: seam on one side of the belt, and provided J.F. MERRIMAN, with a covering of rubber or equivalentmal GEO. W.MORRISON. terial, substantially as described. i

